Free volume vacancy behaviour and dynamic viscosity of diesel fuels with additives at elevated temperature and pressure: thermo-occupancy function

Dinc F. S., Schaschke C., Yahsi U.

INTERNATIONAL JOURNAL OF OIL, GAS AND COAL TECHNOLOGY, cilt.30, sa.2, ss.209-228, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 30 Sayı: 2
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1504/ijogct.2022.122624
  • Dergi Adı: INTERNATIONAL JOURNAL OF OIL, GAS AND COAL TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Compendex, INSPEC
  • Sayfa Sayıları: ss.209-228
  • Anahtar Kelimeler: additives, diesel fuels, dynamic viscosity, Simha-Somcynsky, free volume, thermo-occupancy function, HOLE FRACTION, NEWTONIAN FLOW, DEPENDENCE, LIQUIDS, LINKING, PARAMETERS, MIXTURES, TERMS, STATE, PVT
  • Marmara Üniversitesi Adresli: Evet

Özet

The reported pressure-volume-temperature (PVT) data of five different diesel fuels at T = 297.95-373.06 K and P = 0.1-457.2 MPa were described by the Simha-Somcynsky (SS) equation of state (eos). From the equilibrium condition imposed on the eos, the hole fraction, h = h (P, T), a form of free volume measure, was computed. Furthermore, our physically-based correlation implicating the thermo-occupancy function, Yh = Yh(h, T), in terms of a function of h = h (P, T) and T has been extended in this study to estimate the dynamic viscosity, η, for the mixtures of commercially available fuels. The model bridges a direct relation from an equilibrium property, h, to the transport process, η, of the system and predicts the viscosity with the range from 0.15% to 0.31%. Newly designates 'viscoholibility' function defined as the derivative of logarithm of viscosity with respect to hole fraction has been discussed. It has an exponential decaying behaviour with respect to h.